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How to Solve Find the K-Sum of an Array Problem
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Start Free for WindowsHard#2386
LeetCode ProblemFind the K-Sum of an Array
You are given an integer array nums and a positive integer k. You can choose any subsequence of the array and sum all of its elements together. We define the K-Sum of the array as the kth largest subsequence sum that can be obtained (not necessarily distinct). Return the K-Sum of the array. A subsequence is an array that can be derived from another array by deleting some or no elements without changing the order of the remaining elements. Note that the empty subsequence is considered to have a sum of 0.
ArraySortingHeap (Priority Queue)
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Problem Breakdown
Understanding the Find the K-Sum of an Array Problem
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Problem Statement
You are given an integer array nums and a positive integer k. You can choose any subsequence of the array and sum all of its elements together. We define the K-Sum of the array as the kth largest subsequence sum that can be obtained (not necessarily distinct). Return the K-Sum of the array. A subsequence is an array that can be derived from another array by deleting some or no elements without changing the order of the remaining elements. Note that the empty subsequence is considered to have a sum of 0.
HardProblem #2386
LeetCodeFind the K-Sum of an Array
Related Topics
ArraySortingHeap (Priority Queue)
How Phantom Code Helps
Get real-time assistance for Find the K-Sum of an Array problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
nums = [2,4,-2], k = 5
Output
2
# Example 2
Input
nums = [1,-2,3,4,-10,12], k = 16
Output
10
Constraints
n == nums.length
1 <= n <= 105
-109 <= nums[i] <= 109
1 <= k <= min(2000, 2n)
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Solve Find the K-Sum of an Array — You are given an integer array nums and a positive integer k. You can choose any...
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def solve(input):
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Frequently Asked Questions
Common questions about solving Find the K-Sum of an Array and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Find the K-Sum of an Array during interviews?
Phantom Code generates complete solutions instantly with proper complexity analysis, letting you focus on explaining your approach and demonstrating problem-solving skills rather than getting stuck on implementation details during high-pressure situations.
What if the interviewer asks follow-up questions or modifications to problems like Find the K-Sum of an Array?
Phantom Code adapts in real-time. Screenshot the modified problem or use audio mode to capture the interviewer's follow-up, and get an updated solution within seconds — including edge cases and optimizations.
Can Phantom Code help me communicate my solution for problems like Find the K-Sum of an Array?
Yes. Phantom Code provides step-by-step approach explanations with 3 progressive thoughts, so you can walk through your solution naturally. It also provides time and space complexity analysis to discuss trade-offs.
How does Phantom Code assist with different programming languages for Find the K-Sum of an Array type problems?
Phantom Code supports 11 programming languages including Python, Java, C++, JavaScript, TypeScript, Go, Rust, Ruby, Swift, Kotlin, and C#. Set your preferred language and get idiomatic solutions.
What coding mistakes does Phantom Code help me avoid during Find the K-Sum of an Array interviews?
Phantom Code catches common mistakes like off-by-one errors, missing edge cases, incorrect base conditions, and suboptimal approaches. It provides clean, well-structured code that handles all edge cases.
Is Phantom Code detectable when solving problems like Find the K-Sum of an Array during live interviews?
No. Phantom Code runs as an invisible desktop overlay that doesn't appear in screen shares, recordings, or proctoring software. It works with Zoom, HackerRank, CodeSignal, CoderPad, and all major platforms.
How does Phantom Code help when I'm struggling with Find the K-Sum of an Array style questions under pressure?
The AI provides structured guidance: first the approach (what algorithm/data structure to use and why), then the implementation with clean code, and finally complexity analysis. This helps you think clearly even under pressure.
Does Phantom Code work for the coding platforms used in Find the K-Sum of an Array interviews?
Yes. Phantom Code works with all major coding platforms including LeetCode, HackerRank, CodeSignal, CoderPad, HackerEarth, and any browser-based coding environment.
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